Methods and Apparatus for Plaintext Analysis as Countermeasures Against Side Channel Attacks

Inactive Publication Date: 2016-12-01
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent application provides improvements to countermeasures against side channel attacks. The application uses a novel plaintext analysis approach that is independent of the encryption and decryption modules. This allows for detection and interdiction of side channel attacks as they occur, without the need for modifying existing modules or algorithms. The use of this approach increases the security of user data and reliability of secure systems in a variety of applications. Additionally, the plaintext analysis aspects of the application are independent of the existing encryption and decryption modules and can be used in conjunction with other side channel attack countermeasures to further enhance the robustness of secure systems.

Problems solved by technology

Masking is used to further frustrate attempts to infer secret information from information leakage during the processing.
However, adding randomness to the encryption / decryption requires modification to the encryption system, and necessarily adds inefficiency to the encryption algorithm.

Method used

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  • Methods and Apparatus for Plaintext Analysis as Countermeasures Against Side Channel Attacks
  • Methods and Apparatus for Plaintext Analysis as Countermeasures Against Side Channel Attacks
  • Methods and Apparatus for Plaintext Analysis as Countermeasures Against Side Channel Attacks

Examples

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Embodiment Construction

[0023]The making and using of example illustrative embodiments are discussed in detail below. It should be appreciated, however, that the embodiments contemplated as part this application provide many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the various embodiments, and the examples described are not to be read so as to limit either the scope of the specification, or the scope of the appended claims.

[0024]For example, when the term “coupled” is used herein to describe the relationships between elements, the term as used in the specification and the appended claims is to be interpreted broadly, and is not to be limited to “connected” or “directly connected” but instead the term “coupled” may include connections made with intervening elements, and additional elements and various connections may be used between any elements that are “coupled.”

[00...

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Abstract

Plaintext analysis as a countermeasure against side channel attacks. A system is disclosed that includes an encryption / decryption module performing an encryption algorithm for encrypting plaintext data using a secure encryption key stored in non-volatile memory coupled to the encryption / decryption module, the encryption / decryption module further performing an algorithm for decrypting encrypted ciphertext using the secure encryption key; and a plaintext analysis module coupled to the plaintext data, the plaintext analysis module performing an analysis and determining whether the plaintext data correlates to expected plaintext data, the plaintext analysis module outputting a signal indicating a side channel attack, responsive to the determining. Additional methods and apparatus are disclosed.

Description

RELATED APPLICATIONS[0001]This patent application claims priority to U.S. Provisional Application Ser. No. 62 / 012,578, filed Jun. 16, 2014, entitled “PLAINTEXT ANALYSIS AS COUNTERMEASURE AGAINST SIDE-CHANNEL ATTACKS” which is hereby incorporated by reference herein in its entirety.TECHNICAL FIELD[0002]The embodiments relate generally to plaintext analysis in secure systems using encryption to detect, react to and / or interdict side channel attacks.BACKGROUND[0003]In a side channel attack against a secure system using encryption, attackers use measurements of physical characteristics while the secure system is performing encryption and decryption to try and determine the value of the secret encryption codes, which are typically a data string that is referred to as a secret key. By sending plaintext data for encryption, or by sending ciphertext for decryption, into the encryption and the decryption portions of the secure system, and by then observing the physical characteristics of the...

Claims

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Application Information

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IPC IPC(8): H04L9/00
CPCH04L9/003
InventorGUILLEN-HERNANDEZ, OSCAR MIGUELBREDERLOW, RALF
OwnerTEXAS INSTR INC